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Full-Text Articles in Electrical and Computer Engineering
Bounds On Timing Jitter Estimation In Cooperative Networks, Hani Mehrpouyan, Steven Blostein
Bounds On Timing Jitter Estimation In Cooperative Networks, Hani Mehrpouyan, Steven Blostein
Hani Mehrpouyan
Successful collaboration and resource sharing in cooperative networks require accurate estimation of multiple timing jitters. When combined with signal processing algorithms the estimated timing jitters can be applied to mitigate the resulting inter-symbol interference (ISI) and improve performance. In this paper we seek to derive the Cramer-Rao lower bounds (CRLB) for timing jitter estimation in distributed cooperative networks. In addition to being a benchmark for judging the performance of timing jitter estimators, the CRLBs can be applied to determine the effect of the choices of training sequence and cooperative protocol on timing jitter estimation.
Synchronization In Cooperative Networks: Estimation Of Multiple Carrier Frequency Offsets, Hani Mehrpouyan, Steven Blostein
Synchronization In Cooperative Networks: Estimation Of Multiple Carrier Frequency Offsets, Hani Mehrpouyan, Steven Blostein
Hani Mehrpouyan
The distributed nature of cooperative networks may result in multiple carrier frequency offsets (CFOs), which make the channel time-varying and overshadow the performance gainspromised by collaborative communications. However, much of the analysis in the area of cooperative communications assumes perfect synchronization. This paper seeks to address frequency synchronization in cooperative communication systems, where CFO estimation using a training sequence is analyzed. The Cramer-Rao lower bound (CRLB) for various cooperative protocols is derived. In the next step, we propose two computationally efficient iterative estimators based on the MUltiple SIgnal Characterization (MUSIC) algorithm, that can estimate the CFOs from all the relays …